Tappet.



, Patented Apr. 29,1902. W. & A. McDQNALD 8L 6. D. TREGONING.

TAPPET.

[Application filed Jan; 21, 1901.)

(No Model.)

III I I II N 2%522 C. .Trqyor UNITED STATES PATE T OFFICE.

VALLACE MCDONALD AND ALONZO MCDONALD, OF, CHICAGO PARK, AND CHARLES DAVEY TREGONING, OF GRASS VALLEY, CALIFORNIA.

TAPPET.

SPECIFICATION forming part of Letters Patent N 0. 698,847, dated April 29, 1902.

Application filed January 21, 1901. Serial No. 44,214. (No model.

this nature which can be quickly and easily removed and applied from and to the stem when desired or necessary without disturbing other parts in relation to the stem, the improved device being also capable of replacement Without dismantling the stem.

The invention consists in the construction and arrangement of the several parts, which will be more fully hereinafter described and claimed.

In the drawings, Figure 1 is an elevation of a portion of a stem, showing the improved tappet thereon. Fig. 2 is a similar view looking atvt-he tappet from a different position. Fig. 3 is a view looking at the one end of the tappet. Fig. 4 is a longitudinal vertical section of the tappet shown applied to a portion of the stem.

Similar numerals of reference are employed to indicate corresponding parts in the several views.

The numeral '1 designates a stem of an ordinary ore-crushing stamp, and thereon the improved tappet is secured and comprises a substantially cylindrical body 2, with diametric recesses 3. The body has a bore 4 extending centrally therethrough, of approximately the diameter of the stem 1, and which is partially formed in the said body and also in the inner side of a closing member 5, fitted in a removable manner ina slot 6 in one side portion of the body. The closing member is of the same length as the body and when in place forms a fiush surface at all points with the body and is held in place by upper and lower removable bolts or keys 7, having their headed and nutted and headed ends, respectively, in the confines of the opposite recesses 3 and readily accessible for removal. The bolts extend through portions of the body at opposite sides of the slot 6 and transversely through the member 5, and it is obvious that when the said member is released from the body that the latter can be easily withdrawn from or applied to the stem. Ata point diametrically opposite the slot 6 and opening into thebore 4 a seat-recess 8 is formed in thebody for the reception of a key-block 9, the recess and latter block being of less length than the body and wholly inclosed Within the latter. The recess 8 and block 9 are of substantially rectangular form, and the outer side of said block is directly engaged by elongated keys 10, driven through upper and lower slots extending from the inner vertical wall of one recess 3 to the similar wall of the otherrecess 3, and said keys are, as usual, tapered or made slightly wedge shape, so as to firmly clamp the block 9 against the stem, and thereby hold thetappet firmly in contact and immovable relation with the stem; The side of the block 9 adjacent to the bore at is concaved in an arc corresponding to that of the bore, and by means of the extended bearing of the block.9 on the stem a firm means of securement is provided.

The improved device can be easily constructed, and in view of the great saving in time in removing and applying the tappet involving the features of the invention as compared to similar devices heretofore employed the expense of manufacture is minimized and without in the least impairing the necessary strength.

Having thus described the invention, what is claimed as new is 1. A tappet comprising a body havingalongitudinal bore and a longitudinal slot extending throughout the length thereof, a closing member adapted to shut into said slot, means extending transversely through said closing member and tappet-body for removably securing said member to said body, and means for keying said body to a shaft.

2. Atappet comprising abody having a longitudinal bore and a slot extending throughout the length thereof, a closing member adapted to shut into said slot, screw-bolts exour own We have hereto affixed our signatures tending through said closing member and tapin the presence of two witnesses.

pet-body, said body having a recess disposed WALLACE MCDONALD.

. therein diametrically opposite said slot, a. ALONZO MCDONALD.

5 key-block disposed in said recess, and keys CHARLES DAVEY TREGONING. adapted to extend through said body and Witnesses: v clamp said block to a stemor shaft. CHAS. W. KITTS,

In testimony that we claim the foregoing as W. S. ROBINSON. 

